



 
Harry, The simplest way to do it is this. First make a small table of powers of 5 in base 3. 1 = 1 (base 3) Now using division or repeated subtraction do the conversion. EG: 1000 (base 3 [=27 base ten]) is between 221 and 1112. This is not between 12 and 221: Good Hunting!  


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